3723213781 has 16 divisors (see below), whose sum is σ = 4358425984. Its totient is φ = 3113982144.

The previous prime is 3723213773. The next prime is 3723213797. The reversal of 3723213781 is 1873123273.

It is not a de Polignac number, because 3723213781 - 2³ = 3723213773 is a prime.

It is a super-2 number, since 2×3723213781² = 27724641718056631922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3723213781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3723213701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 323335 + ... + 334651.

It is an arithmetic number, because the mean of its divisors is an integer number (272401624).

Almost surely, 2^3723213781 is an apocalyptic number.

It is an amenable number.

3723213781 is a deficient number, since it is larger than the sum of its proper divisors (635212203).

3723213781 is a wasteful number, since it uses less digits than its factorization.

3723213781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12460.

The product of its digits is 42336, while the sum is 37.

The square root of 3723213781 is about 61018.1430477854. The cubic root of 3723213781 is about 1549.9082541603.

The spelling of 3723213781 in words is "three billion, seven hundred twenty-three million, two hundred thirteen thousand, seven hundred eighty-one".